interface BasicAddress {
  name?: string
  street: string
  city:string
  country:string
  postalCode: string
}

interface AddressWithUnit extends BasicAddress {
  unit:string
}

let awu: AddressWithUnit = {
  unit: '3单元',
  street: '清河街道',
  city:'北京',
  postalCode:'10000',
  country:'中国',
  name:' '
}


interface Colorful {
  color:string
}
interface Circle {
  readius:number
}
interface ColorCircle extends Colorful,Circle {

}
const cc:ColorCircle = {
  color:'red',
  readius:100
}